A lifting device for construction of steel support structure

Abstract

This utility model discloses a lifting device for steel support structure construction, including a mounting frame with a roller on it. The roller is rotatably connected to the mounting frame via a mounting shaft. Two sets of symmetrically distributed ratchet wheels are sleeved on the mounting shaft. Two sets of pawls are provided inside the mounting frame, and both sets of pawls are rotatably connected to the mounting frame via rotating rods. A first gear is sleeved on each of the two rotating rods. Two sets of first racks are slidably installed inside the mounting frame. A connecting frame is slidably installed inside the mounting frame, and a metal block is fixedly installed on the connecting frame. A solenoid corresponding to the metal block is fixedly installed inside the mounting frame. When the motor fails or there is a sudden power outage, the first racks and first gears drive the two sets of pawls to quickly return to their original positions under the action of a torsion spring, engaging and locking with the corresponding ratchet wheels. This achieves double locking of the mounting shaft and the roller, effectively preventing goods from falling and significantly improving the safety and reliability of the lifting device.

Description

Technical Field

[0001] This utility model relates to the field of steel support structure construction technology, specifically a lifting device for steel support structure construction. Background Technology

[0002] In the construction of steel support structures, hoisting and lifting devices are key equipment to ensure the precise installation of steel structures. They are widely used in subway tunnels, deep foundation pit support, bridge engineering and high-rise buildings. Steel support structures are usually composed of heavy components such as H-beams and steel-concrete composite structures. Their installation process requires high-precision positioning and stable lifting. Traditional construction often relies on tower cranes or truck cranes in conjunction with manual adjustments. Currently, most lifting devices on the market are driven by motors or hydraulics.

[0003] Traditional lifting devices mostly rely on motor drives, but they lack effective fall protection mechanisms in the event of sudden power outages or mechanical failures, which can easily lead to goods falling and pose significant safety hazards. Furthermore, lifting ropes are prone to accumulating mud, oil, and other impurities over long-term use, accelerating rope wear, reducing their load-bearing capacity, and potentially even causing breakage. Utility Model Content

[0004] The purpose of this utility model is to provide a lifting device for the construction of steel support structures to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a lifting device for steel support structure construction, comprising a mounting frame, a roller mounted on the mounting frame, the roller being rotatably connected to the mounting frame via a mounting shaft, two sets of symmetrically distributed ratchet wheels sleeved on the mounting shaft, two sets of pawls inside the mounting frame, both sets of pawls being rotatably connected to the mounting frame via rotating rods, both sets of rotating rods being sleeved with first gears, two sets of first racks slidably mounted inside the mounting frame, the two sets of first racks corresponding to the two sets of first gears respectively, the two sets of first racks meshing with the corresponding first gears, a connecting frame slidably mounted inside the mounting frame, the connecting frame being fixedly connected to the two sets of first racks respectively, a metal block being fixedly mounted on the connecting frame, a solenoid corresponding to the metal block being fixedly mounted inside the mounting frame, a power supply device being fixedly mounted inside the mounting frame, the two ends of the solenoid being electrically connected to the positive and negative poles of the power supply device respectively, a fixing frame being fixedly mounted on the mounting frame, and two sets of symmetrically distributed cleaning cylinders being rotatably mounted on the fixing frame.

[0006] As a further preferred embodiment of this technical solution, the two sets of pawls are respectively configured to correspond to the two sets of ratchet wheels, the two sets of pawls are respectively engaged with the corresponding ratchet wheels, and torsion springs are sleeved on the two sets of rotating rods, with the two ends of the torsion springs respectively fixedly connected to the pawls and the mounting bracket.

[0007] As a further preferred embodiment of this technical solution, two sets of symmetrically distributed sliding rods are fixedly installed inside the mounting frame, and the connecting frame is slidably sleeved with the two sets of sliding rods respectively. Two sets of symmetrically distributed first springs are sleeved on the sliding rods, and the two ends of the first springs are fixedly connected to the connecting frame and the mounting frame respectively.

[0008] As a further preferred embodiment of this technical solution, a scraper is rotatably mounted on the fixed frame, a second gear is sleeved on the scraper, a second rack is slidably mounted inside the fixed frame, the second rack is meshed with the second gear, a cylinder is fixedly mounted inside the fixed frame, and the second rack is fixedly connected to the output end of the cylinder piston rod.

[0009] As a further preferred embodiment of this technical solution, two sets of symmetrically distributed movable seats are slidably installed inside the fixed frame, and two sets of lead screws corresponding to the movable seats are rotatably installed inside the fixed frame. The lead screws pass through the movable seats and are threadedly connected to the movable seats. The movable seats are correspondingly arranged on one side of the scraper. A scraper block is slidably installed inside the movable seat and is slidably sleeved with the scraper. A fixed rod is fixedly installed inside the movable seat, and a cam is rotatably installed inside the movable seat. The cam is fitted with the scraper block.

[0010] As a further preferred embodiment of this technical solution, the scraper block is slidably sleeved with the fixed rod, and two sets of symmetrically distributed second springs are sleeved on the fixed rod, with the two ends of the second springs being fixedly connected to the scraper block and the movable seat, respectively.

[0011] This utility model provides a lifting device for the construction of steel support structures, which has the following advantages:

[0012] (1) When the motor fails or there is a sudden power outage, the power supply device is simultaneously de-energized, the solenoid loses its magnetism, and the connecting frame is reset under the elastic force of the two sets of first springs. Then, the two sets of pawls are driven by the first rack and the first gear to quickly return to their original positions under the action of the torsion springs and engage with the corresponding ratchet for locking. This design achieves double locking of the mounting shaft and the roller, effectively preventing the goods from falling and significantly improving the safety and reliability of the lifting device.

[0013] (2) This utility model uses two sets of cleaning cylinders to clean the surface of the rope in real time during the winding and unwinding process, removing impurities such as mud, sand and oil, reducing the risk of rope wear. At the same time, the scraper can automatically clean the dirt attached to the surface of the cleaning cylinder. When one side of the scraper is used, the cylinder drives the second rack and the second gear to switch the working side of the scraper. The moving seat drives the scraper to slide along the fixed frame and reciprocate under the cooperation of the cam and the second spring, thoroughly removing the residual impurities on the scraper. This realizes the automation of the cleaning process, reduces manual intervention, and extends the service life of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram showing the structural separation of the mounting frame and the roller of this utility model;

[0016] Figure 3 For the present utility model Figure 2 Enlarged view of the structure at point A;

[0017] Figure 4 This is a schematic diagram showing the structural separation of the fixing frame and the cleaning cylinder of this utility model;

[0018] Figure 5 For the present utility model Figure 4 Enlarged view of the structure at point -B;

[0019] In the diagram: 1. Mounting bracket; 2. Roller; 3. Mounting shaft; 4. Ratchet; 5. Pad; 6. Rotating rod; 7. Torsion spring; 8. First gear; 9. First rack; 10. Connecting bracket; 11. Slide rod; 12. First spring; 13. Metal block; 14. Solenoid; 15. Cam; 16. Power supply device; 17. Fixing bracket; 18. Cleaning cylinder; 19. Scraper; 20. Second gear; 21. Second rack; 22. Cylinder; 23. Moving seat; 24. Lead screw; 25. Scraper block; 26. Fixing rod; 27. Second spring. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] This utility model provides a technical solution: such as Figure 1 , Figure 2 and Figure 3As shown in this embodiment, a lifting device for steel support structure construction includes a mounting frame 1. The mounting frame 1 is characterized by: a roller 2 mounted on it, the roller 2 being rotatably connected to the mounting frame 1 via a mounting shaft 3; two sets of symmetrically distributed ratchet wheels 4 being sleeved on the mounting shaft 3; two sets of pawls 5 inside the mounting frame 1, both sets of pawls 5 being rotatably connected to the mounting frame 1 via rotating rods 6; a first gear 8 being sleeved on each of the two sets of rotating rods 6; and two sets of first racks 9 slidably mounted inside the mounting frame 1, the two sets of first racks 9 corresponding to the two sets of first gears 8 respectively. Each rack 9 meshes with a corresponding first gear 8. A connecting frame 10 is slidably installed inside the mounting frame 1. The connecting frame 10 is fixedly connected to two sets of first racks 9. A metal block 13 is fixedly installed on the connecting frame 10. A solenoid 14 corresponding to the metal block 13 is fixedly installed inside the mounting frame 1. A power supply device 16 is fixedly installed inside the mounting frame 1. The two ends of the solenoid 14 are electrically connected to the positive and negative terminals of the power supply device 16, respectively. A fixing frame 17 is fixedly installed on the mounting frame 1. Two sets of symmetrically distributed cleaning cylinders 18 are rotatably installed on the fixing frame 17. Each set of pawls 5 is correspondingly set with two sets of ratchet wheels 4, and each set of pawls 5 is engaged with the corresponding ratchet wheel 4. Each set of rotating rods 6 is fitted with a torsion spring 7, the two ends of which are fixedly connected to the pawls 5 and the mounting bracket 1, respectively. Two sets of symmetrically distributed sliding rods 11 are fixedly installed inside the mounting bracket 1. The connecting bracket 10 is slidably sleeved with each of the two sets of sliding rods 11. Two sets of symmetrically distributed first springs 12 are fitted onto each sliding rod 11, the two ends of which are fixedly connected to the connecting bracket 10 and the mounting bracket 1, respectively. During normal operation, the power supply device 16 is a solenoid. Power is supplied to the solenoid 14, which generates a magnetic force to attract the metal block 13, causing the connecting frame 10 to move towards the solenoid 14. The connecting frame 10 drives the first gear 8 to rotate through two sets of first racks 9, which in turn drives the pawl 5 to rotate around the rotating rod 6, disengaging it from the ratchet 4. At this time, the roller 2 can rotate freely to achieve the lifting function. When a power outage or motor failure occurs, the solenoid 14 immediately loses power, and the metal block 13 resets under the elastic force of the two sets of first springs 12. The connecting frame 10 then moves back and rotates the pawl 5 in the opposite direction through the first racks 9 and the first gear 8. At the same time, the elastic force of the torsion spring 7 assists the pawl 5 to quickly rebound, making it tightly engage with the ratchet 4, thereby locking the mounting shaft 3 and the roller 2, preventing the load from falling accidentally, and ensuring construction safety.

[0022] like Figure 4 and Figure 5As shown, a scraper 19 is rotatably mounted on the fixed frame 17, and a second gear 20 is sleeved on the scraper 19. A second rack 21 is slidably mounted inside the fixed frame 17, and the second rack 21 meshes with the second gear 20. A cylinder 22 is fixedly mounted inside the fixed frame 17, and the second rack 21 is fixedly connected to the output end of the piston rod of the cylinder 22. Two sets of symmetrically distributed movable seats 23 are slidably mounted inside the fixed frame 17, and two sets of lead screws 24 corresponding to the movable seats 23 are rotatably mounted inside the fixed frame 17. A through-body 23 is threadedly connected to the movable seat 23. The movable seat 23 is correspondingly positioned on one side of the scraper 19. A scraper block 25 is slidably installed inside the movable seat 23 and is slidably sleeved with the scraper 19. A fixing rod 26 is fixedly installed inside the movable seat 23. A cam 15 is rotatably installed inside the movable seat 23 and is fitted with the scraper block 25. The scraper block 25 is slidably sleeved with the fixing rod 26. Two sets of symmetrically distributed second springs 27 are sleeved on the fixing rod 26. The two ends of the second springs 27 are respectively connected to the scraper block. The lifting device's rope passes through two sets of cleaning cylinders 18 during the lifting and lowering process. The cleaning cylinders 18 effectively remove impurities such as mud, sand, and oil adhering to the surface of the rope through rotational friction, reducing rope wear. The scraper 19 contacts the cleaning cylinders 18 and continuously scrapes away the dirt accumulated on the cleaning cylinders 18. When one side of the scraper 19 becomes contaminated due to long-term use, the cylinder 22 pushes the second rack 21 to move, driving the second gear 20 to rotate, causing the scraper 19 to flip and switch to the cleaning side to continue working. At the same time, the motor in the fixed frame 17 drives the lead screw 24 to rotate, and the lead screw 24 drives the moving seat 23 to slide along the fixed frame 17, causing the scraper block 25 to adhere to the surface of the scraper 19. The motor in the moving seat 23 drives the cam 15 to rotate and periodically squeezes the scraper block 25, causing it to slide back and forth on the fixed rod 26. With the elastic reset of the second spring 27, the residual dirt in the groove of the scraper 19 is thoroughly removed. This process is fully automated and requires no manual intervention, which not only ensures the cleanliness of the rope but also extends the service life of the device.

[0023] This utility model provides a lifting device for the construction of steel support structures. The specific working principle is as follows: During normal operation, the power supply device 16 supplies power to the solenoid 14, causing it to generate magnetic force to attract the metal block 13, which drives the connecting frame 10 to move towards the solenoid 14. The connecting frame 10 drives the first gear 8 to rotate through two sets of first racks 9, which in turn drives the pawl 5 to rotate around the rotating rod 6, disengaging from the ratchet 4. At this time, the roller 2 can rotate freely to achieve the lifting function. When a power failure or motor failure occurs, the solenoid 14 immediately loses power, and the metal block 13 is reset under the elastic force of two sets of first springs 12. The connecting frame 10 moves back and rotates the pawl 5 in the opposite direction through the first racks 9 and the first gear 8. Meanwhile, the elastic force of the torsion spring 7 assists the pawl 5 to quickly rebound, making it tightly mesh with the ratchet 4, thereby locking the mounting shaft 3 and the roller 2, preventing the load from falling accidentally, and ensuring construction safety. During the lifting and lowering process, the rope of the lifting device passes through two sets of cleaning cylinders 18. The cleaning cylinders 18 effectively remove mud, sand, oil and other impurities attached to the surface of the rope through rotational friction, reducing rope wear. The scraper 19 contacts the cleaning cylinders 18 and continuously scrapes away the dirt accumulated on the cleaning cylinders 18. When one side of the scraper 19 becomes contaminated due to long-term use, the cylinder 22 pushes the second rack 21 to move, driving the second gear 2 The scraper 19 rotates to switch to the cleaning side and continue working. At the same time, the motor in the fixed frame 17 drives the lead screw 24 to rotate. The lead screw 24 drives the moving seat 23 to slide along the fixed frame 17, causing the scraper block 25 to adhere to the surface of the scraper 19. The motor in the moving seat 23 drives the cam 15 to rotate and periodically squeeze the scraper block 25, causing it to slide back and forth on the fixed rod 26. With the elastic reset of the second spring 27, the residual dirt in the groove of the scraper 19 is thoroughly removed. This process is fully automated and requires no manual intervention, which not only ensures the cleanliness of the rope but also extends the service life of the device.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lifting device for construction of a steel support structure, comprising a mounting frame (1), characterized in that: The mounting frame (1) is provided with a roller (2), which is rotatably connected to the mounting frame (1) via a mounting shaft (3). Two sets of symmetrically distributed ratchet wheels (4) are sleeved on the mounting shaft (3). The mounting frame (1) is provided with two sets of pawls (5), which are rotatably connected to the mounting frame (1) via rotating rods (6). A first gear (8) is sleeved on each of the rotating rods (6). Two sets of first racks (9) are slidably installed in the mounting frame (1). The two sets of first racks (9) are respectively set to correspond to the two sets of first gears (8), and the two sets of first racks (9) mesh with the corresponding first gears (8). The mounting frame (1) is slidably installed with a connecting frame (10), which is fixedly connected to two sets of first racks (9). A metal block (13) is fixedly installed on the connecting frame (10). A solenoid (14) corresponding to the metal block (13) is fixedly installed in the mounting frame (1). A power supply device (16) is fixedly installed in the mounting frame (1). The two ends of the solenoid (14) are electrically connected to the positive and negative poles of the power supply device (16). A fixing frame (17) is fixedly installed on the mounting frame (1). Two sets of symmetrically distributed cleaning cylinders (18) are rotatably installed on the fixing frame (17).

2. The lifting device for steel support structure construction according to claim 1, characterized in that: The two sets of pawls (5) are respectively set to correspond to the two sets of ratchet wheels (4), and the two sets of pawls (5) are respectively engaged with the corresponding ratchet wheels (4). The two sets of rotating rods (6) are each fitted with a torsion spring (7), and the two ends of the torsion spring (7) are respectively fixedly connected to the pawl (5) and the mounting bracket (1).

3. The lifting device for steel support structure construction according to claim 1, characterized in that: The mounting bracket (1) has two sets of symmetrically distributed slide rods (11) fixedly installed inside. The connecting bracket (10) is slidably connected to the two sets of slide rods (11). Two sets of symmetrically distributed first springs (12) are sleeved on the slide rods (11). The two ends of the first springs (12) are fixedly connected to the connecting bracket (10) and the mounting bracket (1) respectively.

4. The steel bracing construction hoisting apparatus according to claim 1, wherein: A scraper (19) is rotatably mounted on the fixed frame (17), and a second gear (20) is sleeved on the scraper (19). A second rack (21) is slidably mounted inside the fixed frame (17), and the second rack (21) meshes with the second gear (20). A cylinder (22) is fixedly mounted inside the fixed frame (17), and the second rack (21) is fixedly connected to the output end of the piston rod of the cylinder (22).

5. The steel bracing construction hoisting apparatus according to claim 1, wherein: Two sets of symmetrically distributed movable seats (23) are slidably installed inside the fixed frame (17). Two sets of lead screws (24) corresponding to the movable seats (23) are rotatably installed inside the fixed frame (17). The lead screws (24) pass through the movable seats (23) and are threadedly connected to the movable seats (23). The movable seats (23) are arranged corresponding to one side of the scraper (19). A scraper block (25) is slidably installed inside the movable seats (23). The scraper block (25) is slidably sleeved with the scraper (19). A fixed rod (26) is fixedly installed inside the movable seats (23). A cam (15) is rotatably installed inside the movable seats (23). The cam (15) is fitted with the scraper block (25).

6. The steel bracing construction hoisting apparatus according to claim 5, wherein: The scraper (25) is slidably sleeved with the fixed rod (26). Two sets of symmetrically distributed second springs (27) are sleeved on the fixed rod (26). The two ends of the second springs (27) are fixedly connected to the scraper (25) and the movable seat (23) respectively.

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